Probing primordial black holes using gravitational wave data

by Marc Andrés Carcasona (IFAE)

Wednesday 13 Nov 2024, 13:00 → 14:00 Europe/Madrid

IFAE Seminar Room (In-person)

Primordial black holes (PBH) can span a large range of masses depending on their time and mechanism of formation and can also form binaries during the early universe. To probe their existence, either direct or indirect evidence can be searched for in gravitational wave data. In this talk, I present the latest results obtained with a hierarchical Bayesian analysis of the population of binaries observed by LVK as well as a new method to directly detect continuous gravitational waves from the inspiral phase of the merger. With the indirect method with the data up to the O3 run, we obtain that PBHs can make up at most 0.1% of dark matter in the mass range 1−200 solar masses, while with the direct one, we can search in the subsolar mass region, potentially probing the region below 10^{-3} solar masses.